[LordOfTheFlies]

Just installed front Brembo cross drilled and slotted rotors, rear Zimmerman cross drilled and slotted rotors, ebc greenstuff pads in front and back, and stainless steel braided lines all around with ATE super blue fluid.

Install wasn't too bad and I think the whole job including installation ($140 to a local shop) was $600.

Here are some pics......

The problem is that I think that there is something wrong as I seem to see some scoring on the fronts.... and it only seems like it's at the outer edge of the rotor...but it's not exactly scoring since I ran my finger along the "line" and did not feel a groove.....I bedded them in as best as I could have (living in Brooklyn) along Shore Road as there aren't too many people there....But I wonder if I did something wrong.

The rears seem to be fine. I did not notice these lines after installation (and rotating the disc around a few times). Only after I bedded them in and drove about 75 miles on 'em.

Could it be that the piston was not pushed back far enough?

Another thing is that when I roll down the windows and am going about 15 mph and hit the brakes and release a few times I can actually hear the pads against the rotor...but not a grinding sound...just a LOUD kind of braking sound.

Can anyone give me any input on what you see in the pics?

Also it seems like the pad is touching the rotor while at a standstill. Is this right??

Thanks in advance..I'm utterly confused.

[red_k]

Nice setup u got there..
just an observation.. but correct me if I am wrong, but the slots on teh rotors seem to be in the opposite direction (against) the driection of rotation? shldn't it be pointing /// for the LHS rotors and \\\ for the RHS rotors?

[northandy]

Quote: Originally Posted by LordOfTheFlies

Just installed front Brembo cross drilled and slotted rotors, rear Zimmerman cross drilled and slotted rotors, ebc greenstuff pads in front and back, and stainless steel braided lines all around with ATE super blue fluid.

Install wasn't too bad and I think the whole job including installation ($140 to a local shop) was $600.

Here are some pics......

The problem is that I think that there is something wrong as I seem to see some scoring on the fronts.... and it only seems like it's at the outer edge of the rotor...but it's not exactly scoring since I ran my finger along the "line" and did not feel a groove.....I bedded them in as best as I could have (living in Brooklyn) along Shore Road as there aren't too many people there....But I wonder if I did something wrong.

The rears seem to be fine. I did not notice these lines after installation (and rotating the disc around a few times). Only after I bedded them in and drove about 75 miles on 'em.

Could it be that the piston was not pushed back far enough?

Another thing is that when I roll down the windows and am going about 15 mph and hit the brakes and release a few times I can actually hear the pads against the rotor...but not a grinding sound...just a LOUD kind of braking sound.

Can anyone give me any input on what you see in the pics?

Also it seems like the pad is touching the rotor while at a standstill. Is this right??

Thanks in advance..I'm utterly confused.

how did you bed them in ?... it sounds from your post like you did some hard braking to do this ?... (sorry if i'm reading that wrong)... I was always told to avoid havy braking for the first 200 miles, otherwise you get glazing of the pads which reduces efficiency for a while.... the pads should not touch the disk when not applied, that could be causing the lines/marks....

however i'm no expert !

[northandy]

Quote: Originally Posted by red_k

Nice setup u got there..
just an observation.. but correct me if I am wrong, but the slots on teh rotors seem to be in the opposite direction (against) the driection of rotation? shldn't it be pointing /// for the LHS rotors and \\\ for the RHS rotors?

Well spotted !!.... that could be part of the problem !

[LordOfTheFlies]

Quote: Originally Posted by red_k

Nice setup u got there..
just an observation.. but correct me if I am wrong, but the slots on teh rotors seem to be in the opposite direction (against) the driection of rotation? shldn't it be pointing /// for the LHS rotors and \\\ for the RHS rotors?

Well I installed them according to how the boxes were labeled......i.e. L/R.

Let me hunt around to see if I find some other pics. I think I saw them this way as well.

[kapps]

Quote: Originally Posted by northandy

how did you bed them in ?... it sounds from your post like you did some hard braking to do this ?... (sorry if i'm reading that wrong)... I was always told to avoid havy braking for the first 200 miles, otherwise you get glazing of the pads which reduces efficiency for a while.... the pads should not touch the disk when not applied, that could be causing the lines/marks....

however i'm no expert !

There are many different bedding in procedures. As he installed EBC green stuff ( a slightly high performance pad), hard braking probably was his best bet. The idea is to warm up the brakes then do some near lock-up stops from about 70 to 10 (not completely stopping). Very high performance setups actually require this be done a few times to completely bed them in. Here's a link on bedding in brakes: http://www.zeckhausen.com/bedding_in_brakes.htm

[northandy]

Quote: Originally Posted by kapps

There are many different bedding in procedures. As he installed EBC green stuff ( a slightly high performance pad), hard braking probably was his best bet. The idea is to warm up the brakes then do some near lock-up stops from about 70 to 10 (not completely stopping). Very high performance setups actually require this be done a few times to completely bed them in. Here's a link on bedding in brakes: http://www.zeckhausen.com/bedding_in_brakes.htm

Ok.... i did wonder !.... I could imagine that being the case with Redstuff pads and 6 pot's with floating disks, just wasnt sure with a fast road setup that would be the case

[LordOfTheFlies]

Here's a link to Stoptech's site showing the direction of the slots.

http://www.stoptek.com/productphotos/mini/mini.htm

Look at the third pic down.

I installed them correctly

[northandy]

Quote: Originally Posted by LordOfTheFlies

Here's a link to Stoptech's site showing the direction of the slots.

http://www.stoptek.com/productphotos/mini/mini.htm

Look at the third pic down.

I installed them correctly

Well that rules that out then.....

[LordOfTheFlies]

Quote: Originally Posted by northandy

Well that rules that out then.....

Actually I forgot to mention that I think that when he put on the rotors that he did not put them on straight. He only tightened the rotor using the one torx screw. On the backs we used 3 bolts as well. When he spun the front rotors to see if they were straight there was a definitive grinding sound.

However, he didn't spin them ALL the way around - obviously stopped when it started to grind....which then leads to the question why is there a rin ALL the way around the rotor? Another interesting thing is that there are no grooves on the inner side of the rotor.....So what up with that?

Should I tell him to pay for replacement front rotors? Should be $130 or so shipped.

[LordOfTheFlies]

Here is an e-mail from the guy I bought the rotors from. Not sure what to make of it.

Quote: Originally Posted by SportBrakes

from what i read on your posting, the rotors seem ok.
the scratching marks are normal. these rotors are zinc plated, and it
takes 100-200 mile for your pads to completely washed off the zinc.
during this first 100-200, you will feel the vibration and pulsation
when you brake. you will also see the black circular marks on the
braking surface area. but they will be wash off by your brake pads.

do not panic yet, let these rotors run for a few hundreds, let them
brake-in.
if the problem continues after 200 miles, please email me back.

thanks,
sportbrakes

[northandy]

Quote: Originally Posted by LordOfTheFlies

Here is an e-mail from the guy I bought the rotors from. Not sure what to make of it.

I'd give it the 200-300 miles before doing anything else.... if the disks werent on straight you have really bad vibration under braking... doenst sound like you have that...

Give it some time and miles then if they are no better get them replaced.... time will tell with this one !

[LordOfTheFlies]

I'll do that...the only thing that worries me is that the groove is definitely there and doesn't look like it's going away anytime soon.

He also responded when I asked him this:

Quote: Originally Posted by LordOfTheFlies

Just want to make perfectly clear that I can actually
feel the grooves....I double checked this morning when
I drove in....

I just hope they are not ruined! Even if the groove
does not go away, will it be dangerous at all? Or will
it just look bad?

Quote: Originally Posted by Brakesports

it's not dangerous at all. the grooves feeling will fade away soon.

thx

[Hubert]

Quote: Originally Posted by red_k

Nice setup u got there..
just an observation.. but correct me if I am wrong, but the slots on teh rotors seem to be in the opposite direction (against) the driection of rotation? shldn't it be pointing /// for the LHS rotors and \\\ for the RHS rotors?

According to Brembo or AP (can't remember which website), the direction of the slots don't matter. It's the design of the cooling vents between the steel plates that determine whether the rotors are directional.

[obehave]

The slots are on one side only because that is the only side the pad is on.
If you had a big a** Brembo kit with pistons on both sides then you'd need slots on both sides.
Hope this works out for you.
Keep us informed.

BTW nice looking stuff. I'll go the same route once the OEM stuff wears out.

[LordOfTheFlies]

Quote: Originally Posted by obehave

The slots are on one side only because that is the only side the pad is on.
If you had a big a** Brembo kit with pistons on both sides then you'd need slots on both sides.
Hope this works out for you.
Keep us informed.

BTW nice looking stuff. I'll go the same route once the OEM stuff wears out.

Thanks.....but wha "slots" are you talking about exactly? Both sides of each rotor has slots on them. And each rotor has pads on both sides so I'm really confused now!

Here's the same original pic but I've highlighted the exact area of concern.

[northandy]

Quote: Originally Posted by LordOfTheFlies

Thanks.....but wha "slots" are you talking about exactly? Both sides of each rotor has slots on them. And each rotor has pads on both sides so I'm really confused now!

Here's the same original pic but I've highlighted the exact area of concern.

I had another look at the pictures... that groove is very deep, I doubt it will disappear for a long long time !....

I doubt that incorrect fitting could cause that, but some rogue material in the pad could well do that !.... maybe worth seeing if your mechanic will take the pads off again and have a good look at them..... i'd be surprised as EBC are great quality, but never say never, often we rule out thngs without checking them only to find later they were the cause....

[LordOfTheFlies]

Quote: Originally Posted by northandy

I had another look at the pictures... that groove is very deep, I doubt it will disappear for a long long time !....

I doubt that incorrect fitting could cause that, but some rogue material in the pad could well do that !.... maybe worth seeing if your mechanic will take the pads off again and have a good look at them..... i'd be surprised as EBC are great quality, but never say never, often we rule out thngs without checking them only to find later they were the cause....

I find it hard to believe that I managed to get some kind of foreign material only in the front pads! The fact that it happened on both sides make me think that he didn't install them correctly.

[northandy]

Quote: Originally Posted by LordOfTheFlies

I find it hard to believe that I managed to get some kind of foreign material only in the front pads! The fact that it happened on both sides make me think that he didn't install them correctly.

Sorry didnt realise it was both sides... in that case get striaght back to him and ask how he fitted them, theres no reason for scoring like that on new disks and pads !

[LordOfTheFlies]

Quote: Originally Posted by northandy

Sorry didnt realise it was both sides... in that case get striaght back to him and ask how he fitted them, theres no reason for scoring like that on new disks and pads !

You know what? If you look very closely at the Stoptek pic I attached on Page 1 of this forum, I'd bet $100 that you'd see the same kind of groove....visibly as well.....What do you think?